PIPA common mistakes
PIPA · Understand the traps and how to avoid them.
When a scenario describes a behaviour that produces an automatic reinforcer (e.g., scratching that relieves an itch, hand-flapping that produces visual stimulation), the candidate labels the function as 'attention' or 'escape' because an antecedent or consequence involving other people appears in the vignette.
Candidates learn the four-term contingency with social consequences first and default to attention/escape labels; they treat any social event in the story as the maintaining variable rather than asking what consequence reliably follows and strengthens the behaviour.
What to do instead
Before choosing a function, write the consequence that immediately follows the behaviour and ask whether it would still strengthen the behaviour if no one else were present. If yes, select automatic/sensory. If a social consequence is present, verify it is contingent and reliably delivered; if attention and escape both appear, choose the one that is contingent on the behaviour, not merely correlated with the setting.
The candidate describes an intervention as 'using reinforcement' or 'implementing a token economy' without naming the specific target behaviour, the reinforcement schedule, the criteria for earning, and how the reinforcer was identified as effective for that individual.
Study material often summarizes procedures at a label level, and candidates reproduce the label because it sounds technically correct; they do not practise converting a plan into observable, measurable operational terms.
What to do instead
For every intervention answer, force yourself to state: (1) the observable target response, (2) the schedule and delivery criteria, (3) the specific reinforcer and evidence it functions as one, (4) the thinning plan. If an answer option lacks these elements, treat it as incomplete even when the strategy name is correct.
When asked to select a measurement system, the candidate picks event recording (frequency/rate) for a behaviour that is long-duration, occurs at high rates, or has no clear onset and offset (e.g., on-task behaviour, tantrums lasting minutes), or picks duration recording for a discrete countable response.
Frequency recording is taught first and feels like the default 'count the behaviour' answer; candidates do not systematically match the dimension of behaviour (count, duration, latency, magnitude) to the question being asked.
What to do instead
Use a decision rule: discrete, similar-length, countable responses with an observable onset/offset go to event recording; behaviours whose length matters go to duration; behaviours too frequent to count go to time sampling; time to first response goes to latency. State the dimension of interest in one sentence before selecting the method.
The candidate answers an ethics item by choosing the option that is most compassionate or most convenient for the caregiver (e.g., continuing a plan without consent because the family is hard to reach, or sharing client information with a school because it 'helps coordination') rather than the option that follows consent, confidentiality, and least-restrictive-procedure requirements.
Items are written with emotionally appealing distractors; candidates respond to the relational tone instead of the procedural standard, and they have not memorized which obligations are non-negotiable versus which permit professional judgment.
What to do instead
Pre-commit to a hierarchy: informed consent, confidentiality and its permitted exceptions, least restrictive and least intrusive effective procedure, data-based decision making, and scope-of-competence referral. Evaluate each option against that hierarchy in order and eliminate any option that violates a higher-ranked obligation regardless of its tone.
The candidate treats a functional behaviour assessment as a single tool, answering that an FBA 'was conducted' after a single informant interview or a brief ABC observation, and then designing a function-based plan from that thin data.
Textbook flowcharts list interview, direct observation, and experimental analysis as if they were interchangeable steps; candidates compress the process and do not distinguish descriptive correlation from experimental demonstration of function.
What to do instead
Classify the evidence in the stem: indirect (interviews, rating scales), descriptive (ABC, scatterplot), or experimental (functional analysis, trial-based FA). Match the confidence of your conclusion to the evidence level, and prefer answers that triangulate multiple sources or that state when an experimental analysis is warranted because descriptive data are inconclusive.
The candidate writes or selects a behaviour support plan that lists only consequence strategies (e.g., a token system plus response cost) and omits antecedent manipulation, teaching of a functionally equivalent replacement behaviour, and reinforcement of that replacement.
Consequence procedures are the most memorable and easiest to describe; candidates under-weight prevention and skill-building because those components require linking the FBA function to a specific replacement response.
What to do instead
Structure every plan answer as four explicit parts: antecedent/prevention adjustments, a functionally equivalent replacement behaviour that produces the same reinforcer, reinforcement schedule for that replacement, and consequence strategies for the challenging behaviour. If any part is missing from an option, it is an incomplete plan.
The candidate recommends a restrictive or crisis-level procedure (physical restraint, seclusion, exclusionary time-out) for behaviour that is not an imminent danger, or selects it before less intrusive alternatives have been documented as ineffective.
Crisis items and non-crisis items look similar, and candidates conflate 'the behaviour is serious' with 'a restrictive procedure is indicated'; they also skip the required documentation of less intrusive attempts.
What to do instead
Apply a threshold question: is there imminent risk of serious harm to self or others? If no, restrictive procedures are out of scope for the answer and the correct option is a less intrusive, function-based strategy. If yes, select the safety procedure and pair it with the required safeguards (trained staff, monitoring, documentation, debrief, plan review).
The candidate interprets a graph by looking at the last few data points only, calling a change in level a treatment effect without checking baseline trend, variability, and whether the change coincides with the intervention introduction.
Visual analysis is taught as a list of features but practised rarely; candidates respond to the most visually salient feature (a jump or a dip) rather than systematically comparing level, trend, and variability within and across phases.
What to do instead
Analyse in fixed order: describe baseline level, trend, and variability; predict what baseline would have done; compare the first several intervention points to that prediction; then check for overlap, immediacy, and consistency across similar phases. State explicitly whether the change is attributable to the intervention or to an existing trend.
When a stem describes a skill deficit (the learner cannot yet perform the response) the candidate selects a consequence-based reduction strategy, and when the stem describes a performance deficit (the learner can perform it but does not) the candidate selects a teaching/acquisition procedure.
Candidates focus on the topography of the problem behaviour and skip the acquisition-versus-performance distinction, so the intervention does not match the actual deficit.
What to do instead
Ask two questions before choosing: can the learner perform the response reliably in any context? If not, it is an acquisition problem and the answer involves prompting, shaping, chaining, and prompt fading. If yes, it is a performance problem and the answer involves motivating operations, reinforcement contingencies, and stimulus control.
The candidate answers collaboration and training items by choosing the option where the behaviour analyst makes the decision for the team or delivers training as a one-time lecture, rather than building caregiver and staff skills through modelling, rehearsal, feedback, and monitoring of implementation fidelity.
Clinical expertise is emphasized in training, so candidates equate the correct answer with the most expert-driven option; they also under-attend to fidelity and maintenance as required elements of staff training.
What to do instead
For collaboration items, prefer answers that include collaborative goal setting, behavioural skills training (instruction, modelling, rehearsal, feedback), plan for generalization and maintenance, and objective fidelity checks. Reject options that are one-shot, top-down, or lack any measure of whether the trainee actually implements the procedure.